Manganese metabolism in humans

Area of Science:

• Biochemistry
• Neuroscience
• Environmental Health

Background:

• Manganese (Mn) is an essential trace element crucial for numerous enzymatic activities and physiological processes.
• While Mn deficiency is rare, excessive exposure can lead to manganese poisoning, particularly affecting the brain and causing neurodegenerative symptoms.
• Recent concerns highlight Mn's neurotoxicity and the need to understand its homeostasis.

Purpose of the Study:

• To review recent advancements in understanding manganese absorption, distribution, and elimination.
• To explore the intracellular regulation of manganese homeostasis.
• To identify critical areas for future research in manganese metabolism.

Main Methods:

• Literature review of studies on manganese absorption, distribution, and elimination.
• Analysis of research on intracellular mechanisms regulating manganese homeostasis.
• Synthesis of current knowledge on molecular mechanisms of manganese toxicity.

Main Results:

• Manganese plays essential roles as a cofactor for enzymes involved in development, energy production, and neuronal activity.
• Excessive manganese accumulation in the brain is linked to neurotoxicity, including Parkinsonism-like symptoms.
• Molecular mechanisms of Mn toxicity involve oxidative stress, mitochondrial dysfunction, and disrupted cellular processes.

Conclusions:

• Further research is needed to fully elucidate the mechanisms of manganese homeostasis.
• Understanding Mn transport and regulation is crucial for addressing manganese toxicity and its health implications.
• Future studies should focus on Mn absorption, distribution, elimination, and intracellular regulation to prevent adverse health effects.